Paper-bag machine



4 Sheets-Sheet 1,

(No Model.)

L. C. C-ROWELL.

' PAPER BAG'MAGHINE. I

' Patented Dec. 12,1893.

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Wes/Z; I I 4 liu/flzerd. Growell,

THE mmoNAL uninelumma couPANY.

WASHINGTON. n. c.

(No Model.) 4 sheets-sheep 2.

L. 0. CROWELL.

--PAPER BAG MACHINE.

No. 510,410. Patented Dec. 12', 1893.

we NATIONAL LIYHOGMMING ODMPINY.

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(No Model.) 4 Sheets-Sheet 3.

L. 0. OR OWELL; PAPER BAG MACHINE.

No. 510,410. Patented Dem-12, 1893.

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U ITED STATES 1 PATENT FFIC'E.

LUTHER o. OROWELL, or BROOKLYN, NEW YORK.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent No. 510,410, dated December 12, 1893.

Application filed July 11, 1882. Serial 68,391. (No model.)

To all whom it may concern:

Be it known that I, LUTHER O. ORoWELL, a citizen of the United States, residing in the city of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Paper-Bag Machines, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

The present invention relates to the manufactu re of satchel-bottom bags from a continuous tube of paper by a method involving that step known as the formation of the diamond fold.

The invention has for its object the organization of a mechanism for producing these bags, which shall be simpler in its construction, more rapid and reliable in its operations, and less expensive than those heretofore in use.

To that end the invention consists principally in a method of and means for defining the fold lines for the edges or outline of the diamond, and in devices for opening the end of the tube to diamond form.

It also embraces certain features of the ap paratus for folding the points of the diamond to close the bag bottom, and certain other features of construction, both singly and in various combinations, as will be hereinafter fully explained and particularly pointed out.

In said drawings: Figure 1 is a side elevation, Fig. 2 a plan, and Fig. 3 a longitudinal vertical section of a mechanism embodying the invention. Figs. 4 and 5 are sectional views showing the parts in different positions for the purpose of illustrating their operation in the formation of a bag. Fig. 6' is a side View of the cutting blade; Fig. 7 a plan view of the tube after it has been opened to the diamond form, and Fig. 8 a side view of the first folding blade.

The tube from which the bags are made,

. after being formed in any of the well known provided with a severing. blade 7 which is fixed at each end to arms 8 pivoted upon the interior of the roll in such manner that they can be rocked so-as to cause the blade to oscillate in and outthrough a longitudinal slot 9 in the roll. The arms 8 are controlled by springs 10 so as to normally hold the blade retracted, but as the roll revolves studs 20 upon the arms are brought into contact with fixed cams ll whereby-the blade is forced outward so as to coact with groove 12 of roll 3 and sever the tube, except the small portion 13 of the lower ply, (see Fig. 7) which remains uncut because of the recess in the center of the cutting blade. This recess is of such depththat while the portions 15 of the blade (see Fig. 6) pass through both plies of I the tube and into the groove 12, the portion 14 will not reach the lower ply, but will simply pass across the end of the former or guide and through the upper ply. The roll 2 is also provided upon its periphery with projections 16 of felt or other absorbent elastic material, which, as the roll revolves, receive moisture from the absorbent roll 17 supplied with water from the fountain 18. The projections 16 are so located upon the roll (see Fig. 2) that in passing in contact with the tube they will moisten its upper ply upon the lines 19 which are to become the fold lines of the diamond. (See Fig. 7.) This moistening renders the paper so limp that it will readily fold upon these lines and form an accurate diamond without the aid of any mechanical devices for determining the lines of fold. The roll 3 may if desired be provided with a similar apparatus for moistening the lower ply of the tube to determine the fold lines 21, but the moistening of the upper ply will usually be found sufiicient. v

In working some kinds of paper it may be found desirable to allow a short time for the water to soak into the paper before the tube reaches the diamond fold forming apparatus. In such the moisture may be applied by an independent pair of rolls located in the rear of the cutting rolls, and these rolls may be arranged to act upon the paper either before or after the tube is formed. The tube after leaving the rolls 2-3 passes slightly upward and then forward across a guide 22, which is preferabl y a roll, as shown, but may be a rigid bar,

by which it is so bent that its severed upper ply will stand slightlyawayfrom the lowerply, thereby opening the mouth of the tube. This raising of the upper ply permits it to pass into the control of the diamond fold forming apparatus which will now be explained. This apparatus consistsof a light rectangularframe composed of two bars 2324 connected at their ends by cross pieces 25 and at their centers by a narrow plate 20. The cross pieces 25 are pivotally connected at their centers to swinging arms 27 which depend from studs 28 fixed in brackets 29 at the sides of the machine. spectively with narrow plates or fingers 30-3l which extend from the bars so as to lie upon the opposite sides of and parallel with the plate 26, but at a short distance therefrom. The ends of the bars 23-24 extend slightly beyond the cross pieces 25 and form studs -36, which are alternately operated upon by the forked ends 37 of the oscillating levers 32. The bend of the tube in passing over roll 22 will be such, as already explained, as to raise the upper ply and cause it to enter and pass forward between the plate 26 and finger 31, as shown in Fig. 4. lVhen the advancing end of this ply has entered a suflicient distance between the plate and finger, the levers 32, actuated through links 33 from cams 34 upon the shaft of roll 3, will begin to advance and carry forward the diamond fold forming apparatus at a speed equal to the feed of the tube. As this apparatus is carried forward it will swing upon the arms 27 so that its forward portion will be raised and carried backward, describing substantially an arc of a circle, and carrying the upper ply of the tube with it. \Vhen the apparatus has been thus carried to a vertical or slightly beyond a vertical position, the levers 32 will be drawn backward, leaving the mouth of the tube distended, as shown in Fig. 5. From this position the bar 23 will be carried forward by the feed of the tube and the bar 24 will be gradually lowered until it finally falls into the forks 37 of thelevers 32, thus reversing the apparatus and bringing the bar 24 and finger 30 into position to act upon the bottom forming portion of the next blank, as shown in Figs. 3 and 4. It will be observed that after leaving the guide roll 22 the tube passes across a plate 39, by which it is sustained against the weight of the diamond fold forming apparatus.

It will readily be seen that in the operation just described, the upper ply of the tube will be folded backward across the bar 23 to form the central transverse fold 38 of the diamond, and its sides will be drawn inward so as to form the folds upon the lines 19 and 21. As the feed of the tube continues this operation will be repeated at regular intervals and diamond folds will be formed in the tube at the distance of a bag length apart.

The principal advantages of the diamond fold forming mechanism just described are due to the simplicity both of its construction The bars 23-24 are also provided reand operation and to the fact that its movements are positive and such that the fold is laid without subjecting the material to any strain whatever.

Instead of being pivoted to the swingingarms 27, the cross pieces 25 may be provided with studs which workin cam grooves of the proper form to guide the frame in its move ments. The cross-plate 26 as will readily be seen is not absolutely essential and may be dispensed with if desired. The diamond fold having been formed as just described, the tube passes to rolls 4041 which are provided with devices for performing the operations necessary tocomplete the bag, the rear point of the diamond being held in proper position during such passage by the suspended guide plate 75 beneath which it passes. The roll 41 is provided with a cutting blade 42 which coacts with a groove 43 upon the roll 40 to sever the small portion 13 of the tube which up to this point has remained uncut, Just in the rear of the groove 43 the roll 40 1s provided with a set of pins 44 which are protruded at the time the part 13 is cut, so as to impale the front point of the diamond and carry it around upon the roll 40. In the rear of the pins 44 the roll is provided with pasting ridges 45-59 which as the roll revolves apply paste to the properportions of the diamond. The paste for this purpose 1s supplied to the ridges from the fountain 46 through the rolls 474849 in the usual manner. As the diamond is carried forward upon roll 40, the rotating folding blade 50 Will be operated at the proper time to fold the front point upon the line a; 00 into the bite of rolls 5152, the pins 44 being at the same time retracted so as to leave the point free. (See Fig. 4.) The folding blade 50 is made 111 three sections, as shown in Fig. 8, so as not to interfere with the pasting ridges 45 and not to come into contact with the lines of paste upon the diamond. After being thus folded the blank passes upward between roll 52 and tapes 53 and along guides 54 until it again comes above the roll 40 in passing between the guides and the rolls 55-56. The guides 54 keep the blank from coming into contactwith the roll 40 at this point and thus prevent the body of the bag from being smeared with paste from the ridges 45. When the blank has advanced sufficiently the rotating folding blade 57 will be operated to fold the rear point of the diamond and the body of the bag upon the line y, y between the rolls 5556 thus completing the bag. It will be observed that the roll 56 is placed a sufficient distance from the guides 54 to permit the advance end of the bag bottom to be readily drawn backward when its direction of motion is thus reversed. After passing between the rolls 5556 the bag will be delivered to mechanism, such for example as that shown in United States Letters Patent No. 231,642, for removing the fold made in its body at the time the rear point of the diamond was folded, or be carried away from the machine by tapes, as 53-58, and delivered in any suitable manner.

The folding blade 57 is composed of two instead of three sections, the middle portion, which in blade 50 lies between the pasting ridges, being omitted on account of the guides 54 and the cross pasting ridge 59. (See Fig. 2).

The devices for operating the blades 50 and 57 and the pins 44 are those usually employed for the purpose and consequently need no specific description.

Although it is preferable that the pins 44 should be movable, as shown, it is not neces sary that they should be so, as fixed pins may be used successfully.

The rolls 2-3 and 40-41 are provided with engaging gears 60-61 and 62-63 and are connected by an intermediate 64 so as to be driven in unison.

What I claim is- 1. The combination with feeding mechanism for advancing a tube, of moistening apparatus for applying moisture to the fold lines of the tube, and a finger laying one ply of the tube back to form the diamond fold, substantially as described.

2. The combination with the rotated frame provided with fingers, as -31,of means for opening the end of the tube to permit the entrance of one of the fingers, all substantially as described.

3. The combination with the swinging and rotating frame provided with fingers, as 30- 31, of levers, as 32, and means for oscillating the same, all substantially as described.

'4. The rotating frame provided with fingers, as 30-31, arranged to enter the end of the tube, substantially as described.

5. The combination with the roll, as 40, provided with two folding blades and pasting ridges, of the two pairs of folding rolls and a paste supplying apparatus, substantially as described.

6. The combination with the roll,as 40, provided with holding pins, pasting devices and two sectional folding blades, of two pairs of co-operating folding rolls, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

LUTHER O. OROWELL.

Witnesses:

Ms. A. HovEY, ANTHONY N. J ESBERA. 

